- Companies
- Civil engineering
- London
- McConnell Utilities Limited
McConnell Utilities Limited
- Company number
- 16740794
- Incorporated
- 24 Sep 20251 year trading
- Registered office
- 1 Office One, Coldbath Square, London, EC1R 5HL
- Nature of business
- Construction of other civil engineering projects n.e.c.
McConnell Utilities Limited is a 1-year-old private limited company registered in London, company number 16740794, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 24 June 2027, and its first CT600 is due at HMRC on 23 September 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where McConnell Utilities Limited is registered
The registered office is in London (EC1R), in the Islington local authority area, London. Show EC1R 5HL on a map.
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What happens if McConnell Utilities Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 24 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 25 Jun 2027 to 24 Jul 2027 | £150 |
| 1 to 3 months late | 25 Jul 2027 to 24 Sep 2027 | £375 |
| 3 to 6 months late | 25 Sep 2027 to 24 Dec 2027 | £750 |
| More than 6 months late | From 25 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 16740794
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 September 2025 (1 year ago)
- Registered office
- 1 Office One, Coldbath Square, London, EC1R 5HL
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- McCormack Civil Engineering Limited2025
- McGowan Construction Limited2009
- McKinley Construction Limited2004
- McLean Project Services Ltd2023
- MCM Structures Limited2023
- McManus Utilities Ltd2020
- McVid Investment Ltd2019
- MD Buliga Ltd2025
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are McConnell Utilities Limited's accounts due?
McConnell Utilities Limited's next accounts are due at Companies House by 24 June 2027 (in 254 days), covering the period to 30 September 2026.
When is McConnell Utilities Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 23 September 2026, due by 23 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is McConnell Utilities Limited still trading?
McConnell Utilities Limited is listed as active on the Companies House register (checked 13 Oct 2026). Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does McConnell Utilities Limited do?
McConnell Utilities Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is McConnell Utilities Limited?
McConnell Utilities Limited was incorporated on 24 September 2025, 1 year ago.
What is the penalty if McConnell Utilities Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View McConnell Utilities Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.